Toy building block



FIG. 1 is a front view of the design according to the invention.

FIG. 2 is a rear view of the design according to the invention.

FIG. 3 is a plan view of the design according to the invention.

FIG. 4 is a right side view of the design according to the invention.

FIG. 5 is a left side view of the design according to the invention.

FIG. 6 is a sectional view along line 6—6 in FIG. 1 according to the invention.

FIG. 7 is a perspective view of the design showing that the clip portions of the design are opened.

FIG. 8 is a plan view of the design showing that the clip portions of the design are opened.

FIG. 9 is a sectional view of the line 9—9 in FIG. 8 according to the invention.

FIG. 10 is a sectional view of the line 10—10 in FIG. 8 according to the invention; and,

FIG. 11 is a perspective view showing an environmental use thereof, which shows portions that are not part of the claimed design and a plurality of the claimed designs.

The elements shown in broken lines are for illustrative purposes only and form no part of the claimed invention. 

The ornamental design for a toy building block, as shown and described. 